US18037A - Device for piercing- blind-slats to receive the staples - Google Patents

Description

NITED STATES PATENT OFFICE.

` JOHN CARPENTER, OF STONINGTON, CONNECTICUT.

DEVICE FOR PIERCING BLIND-SEATS TO RECEIVE THE STAPLES.

Specification of Letters Patent No. 18,037, dated August 25, 185'?.

To all whom t may concern.'

Be it known that I, JOHN CARPENTER, of StoningtomNew London county, and State of Connecticut, have invented a new and useful Improvement in Machines for Cutting the Tenons of Blind-Slats; and I do hereby declare that the following is a full and eXact description thereof; reference being had t0 the accompanying drawings, making part of this specification.

My invention consists of a peculiar arrangement of machinery for cutting the t-enons on both ends of blind slats, and piercing them for the wire staples, simultaneously.

Figure l of the accompanying drawings is a front view of the machine. Fig. 2 is a vertical, or top view. Fig. 3 is an end view. Similar letters of reference indicate s1m1- lar parts in each.

The frame A B is made of iron. The top is planed off to form ways for the cutting heads C D E F, to slide on.

D D are disk wheels, on the side of which, one or more knives are attached, for cutting the tenons. These cutting heads are made to advance inward, to cut the tenons on the slat, which is held firmly by a gripe or Ydog on the holding bar G.

The disk wheel` and cutter attached thereto is shown more conspicuously at Fig. 4.

The cutters consist of knives K applied on the front face of the disk, by being dovetailed in a groove formed therein, in such manner, that the outer surface of the cutter which is a plane surface, shall not only project beyond the face of the disk, but shall have a diagonal position thereon, so that the front or cutting, edge z', shall be higher from the surface of the disk, than the rear edge y', and so that the forward 0r advancing end z' j of the cut-ter shall stand higher therefrom than the following end z" j', so that the forward or advancing corner z' shall be highest and the opposite corner j shall be lowest from the surface.

The cutter is held from sliding in the groove in which it is fitted, by a bolt, passing through a slot in the plate forming the cutter.

The cutting edge of the knife is curved in such manner, and is placed on t-he face of the disk in such position, as to cut from the outer edge of the slat in forming the tenon, a little in advance of the inner or central portion, in order that the cutting .jmay be performed easierthan when the whole length of the knife should act at once.

The knife being once faced and in position in its place, always retains its face, the grinding being always performed on the beveled cutting edge.

From the peculiar mode of settin the cutters on the face of the disk, com ined with the curve given to the cutting edge, the action thereof has a strong tendency to cause the cutter heads to advance on the work while cutting the tenons, so that the heads do not require force to bring them forward while in action, but rather require a counteraction thereon as the cutting edge of the knife as set, acts as the thread of a screw, to cause it to advance.

According to this system of constructing and applying the knives, they can always be made to cut a tenon of the same size from their first application, till they are entirely worn out; since the forward or surface plane is always the same although the cutter is advanced in the direction from c" y" to z' j as the beveled cutting edge is worn or ground away; and to secure this uniformity of size or to enlarge or decrease the same, it is only necessary to move the cutting plate longitudinally in its seat and fasten it in any proper position by the bolt.

H is a driving cylinder which gives motion to the cutters by the belts I on the pulleys K.

L is a hand shaft on which is placed an armor link M N, connected by rocking joints M and N with the rods or sweeps P, which are also'connected with the sliding frames C D E F, so that the operator by turning the hand wheel Q and shaft, may cause both the cutters to advance simultaneously, to a slat, held by the holding bar, in order to form tenons thereon, and to recede therefrom when finished.

The sweepsl or rods I), are connected to the rocker joints M and N, by passing through and being held therein by set screws e, in order that they may be adjusted at pleasure to any proper position, such as may be necessary by varying the width of slats.

S is a gage screw with right and left hand threads, causing the nuts R which do not revolve with the screw, to traverse toward, or from the center, by turning the screw, which is done by the operator at the pulley T. These nuts when adjusted serve as stops or gages to govern the traverse of the cut-- ting heads, and consequently the length of the slat when inished, by means of arms or brackets H, reaching from the sliding frame and spanning the screw loosely, and susceptible of traversing freely, till one or the other of the brackets U come in contact with the nut.

In front of the cutting disks D, and connected with the sliding frame are spring clamps F to hold the slats steady, and to furnish support therefor at each end, while being cut; the middle of the slat resting on, and being held by the holding bar Gr, which is iXed iirmly in its position on the frame.

s, s, are springs for these clamps which press on the upper jaw, with sufficient force to hold the slat steady.

g is a sliding dog carrying the piercing points h, for piercing the edge of the slat for the wire staple, and which tends also to hold the slat irmly, by penetrating it and pressing thereon while forming the tenon, and is actuated by the eccentric e, on the hand wheel shaft, through the medium of the yoke f, elbow lever Z, and arm m; the holding bar G, being hollow beneath its upper surface, and having a slot through which the sliding dog g, may connect with the arm mi.

'Ihe form of the eccentric e is sectoral as shown at Fig. 5, and is so connected, and applied as to act rapidly in `moving the sliding dog, While the cutting heads are at, or near their eXtreme distances; but more gradually, and to cease to act thereon, as they approach, while cutting the tenons; the dog while in this action pressing hard onthe edge of t-he slat, and the piercing points being fixed therein.

In the use of this machine I proceed as follows viz.: Having adjusted the gage screw, so that the nuts R, R, shall stand in proper positions thereon, and having so adjusted the connections or sweeps P, (which actuate the traverse of the cutter heads) by the set screws .e in the rocker joints M, N, as to suffer the cutter heads to approach sufriciently, to allow sufficient length to the slat when the tenons are cut thereon, and allowing the outer brackets U to come in contact with the nuts R; care being had also that the eccentric e which actuates the sliding dog g, shall be so set on the shaft, as to press upon and cause it to hold and pierce the slot and cease to advance at the proper time. The slat is then placed upon the holding bar, and the hand wheel is turned so as to draw the cutter heads inward toward the center, the spring clamps F, connected therewith receive the ends of the slat as they advance while the sliding dog having already advanced and pierced the edge of the slat, holds it firmly, while the cutters continue to advance thereon and cut the tenons after which by a reverse action of the hand wheel it is liberated and removed, and the process may be repeated by inserting another slat.

I am aware that machines have been constructed for cutting the tenons simultaneously at both ends of blind slats, as in the machine patented by Hastings Bumsey and Chamberlin Feb. 20th 1855 and also for cutting the tenons and` piercing the slats for wire staples simultaneously as in the machine patented to T. G. Stagg March 28th 1854. But I do' not claim any device or action included in either of these machines referred to. But

What I claim as my invention and for which I solicit Letters Patent is,

I do not claim the application of a sliding dog to clamp and hold the slat, while another dog or other device independent of this is used for piercing the slat for the staple; but I claim the application of the piercing points h, to the sliding dog g, so that the slat may be pierced for the wire staples by the same action as that by which they are held secure t'or forming tenons thereon as described.

JOI-IN CARPENTER.

Witnesses:

N. SCHOLFIELD, NELSON A. WOODARD.

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